Motor on its way out?

[Steve-O2021]

 

Seems to be making more noise than normal when its slowing down off power, is this what it sounds like when the motor is on its way out? 

 

 

Thanks

[Alex97]

Poor mesh maybe, remove the pinion and spin the motor up using the ESC. If it's still making that noise then yes, if not then either the mesh is off or something is causing the binding. 

[Nitroholic]

listening to the noise your car makes when you roll it is like listening to a 100 piece orchestra and trying to work out which violin is out of tune.

 

Assuming it's a brushless motor, there are really only 2 things that fail. Either the bearings die, or the magnets delaminate and basically come away from the rotor. Isolate your motor so you can rule out background noise. Simplest way is just undo the pinion. Or if you want ..take the motor out.

With the pinion loose...roll your car again too. If the noise persists...it's NOT the motor.

 

Give it some gentle revs ( don;t mash it...this under zero load... ) then let it wind down. If it still sounds noisy, then yes...the motor is probably on the way out.

 

Take the motor out, and turn the shaft. Feel for gritty bearings. Listen for grinding noises. You should feel the strong magnetic pull when you turn, but it should be noise free. If you can, open up the can and check it if you suspect an issue. Cheap motors don;t always facilitate this kind of inspection. You may be able to replace worn bearings and get some more use out of the motor if it's not too far gone.

 

Edited October 15, 2023 by Nitroholic